尝试任何人的挡路代码。我希望它能解决你的错误。

final imageView1 imv = new imageView1();
        final Image image2 = new Image(Main.class.getResourceAsStream("a.jpg"));
        imv.setImage(image2);

或

    @FXML
    private ImageView1 imageView;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        File file = new File("F:/a.jpg");
        Image image = new Image(file.toURI().toString());
        imageView.setImage(image);
    }

或

FileInputStream input = new FileInputStream("F:/a.jpg");
Image image = new Image(input);
ImageView1 imageView = new ImageView1(image);